Method of controlling production processes and apparatus therefor
US4330828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1979 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Oct 11, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M19/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for controlling production processes utilizing a three-state, four-mode process controller which operates on the basis of counteracting any process change by utilizing the difference between a feedback signal related to a current condition of the process and a desired value related to the desired condition of the process, and a signal related to the rate of change between said feedback signal and said desired value signal, to produce a correction signal which is utilized to operate said three-state, four-mode process controller in its three states depending on certain relationships between the value of the desired value and feedback signals, as well as the summation of those values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.